1. ISUAL HIGH VOLTAGE SUPPLIES P.BERG

2. CDR 9 JULY 20012NCKU UCB Tohoku High Voltage Supplies P. Berg HIGH VOLTAGE P0WER SYSTEM OVERVIEW HIGH VOLTAGE IS REQUIRED ON ISUAL TO SUPPLY THE PHOTOMETER, THE IMAGER MICRO CHANNEL PLATE DETECTOR, AND THE IMAGE PHOSPHER THE HIGH VOLTAGE POWER SUPPLIES ARE DESIGNED TO OPERATE AT AMBIENT PRESSURE OR UNDER VACUUM ( MINIMUM 2HR PUMPDOWN ) HIGH VOLTAGE DISTRIBUTION IS ACCOMPLISHED USING CUSTOM UCB CONNECTORS AND PLUG-IN INTERFACES, AVOIDING CABLES

3. CDR 9 JULY 20013NCKU UCB Tohoku High Voltage Supplies P. Berg HV POWER SUPPLY BLOCK DIAGRAM EMI FILTER COLPITTS OSCILLATOR C-W MULTIPLIER OUTPUT FILTER ERROR AMP VOLTAGE MONITOR CURRENT MONITOR -HV OUT +12 +12 Return Imon CONTROL VOLTAGE VmonOFFSET FEEDBACK Isense Vsense

4. CDR 9 JULY 20014NCKU UCB Tohoku High Voltage Supplies P. Berg SPECTROPHOTOMETER HIGH VOLTAGE SUPPLIES DESIGN BASED ON SUPPLIES FLOWN ON EUVE, FAST, AND IMAGE FUV –TWO TRANSISTOR PUSH-PULL COLPITTS OSCILLATOR DRIVES COCKCROFT-WALTON STACK –CIRCUIT INCLUDES VOLTAGE AND CURRENT MONITORS AND OVER CURRENT LIMITING MULTIPLIER STACKS BASED ON CW CARLSON DESIGN –COMPACT IMPLEMENTATION WITH VERY GOOD CONTROL OF E-FIELDS AND SURFACE BREAKDOWN PATHS HVPS HEAT CONDUCTED TO SIDEWALLS AND THEN TO BASE PROGRAMMABLE TO FULL OUTPUT VOLTAGE WITH 0 TO 5 VOLT INPUT CAN DELIVER 100 uA QUIET OUTPUT - <1MV UNLOADED NOISE POUR POTTED TO SAVE WEIGHT SERIES OUTPUT RESISTOR TO ABSORB BRIEF SHORTS OPERATE FROM SINGLE +12 VOLT SUPPLY THERMISTOR TEMPERATURE MONITOR

5. CDR 9 JULY 20015NCKU UCB Tohoku High Voltage Supplies P. Berg IMAGER 7000 VOLT PHOSPHER SUPPLY

6. CDR 9 JULY 20016NCKU UCB Tohoku High Voltage Supplies P. Berg IMAGER MCP 1100 VOLT SUPPLY

7. CDR 9 JULY 20017NCKU UCB Tohoku High Voltage Supplies P. Berg SPECTROPHOTOMETER -2500 V SUPPLY

8. CDR 9 JULY 20018NCKU UCB Tohoku High Voltage Supplies P. Berg HIGH VOLTAGE MULTIPLIER STACK

9. CDR 9 JULY 20019NCKU UCB Tohoku High Voltage Supplies P. Berg HVPS PARTS LOW VOLTAGE AND DISCRETE PARTS CHOSEN FROM NASA PPL 22 HIGH VOLTAGE FILTER CAPACTORS BUILT FROM HI-REL SCREENED COMMERCIAL PARTS HIGH VOLTAGE CONNECTORS DESIGNED AND BUILT AT SSL INTEGRATED CIRCUIT AMPLIFIERS RAD HARD TO BETTER THAN 20 K RAD

10. CDR 9 JULY 200110NCKU UCB Tohoku High Voltage Supplies P. Berg STACK CAPCITOR SCREENING PROGRAM CAPACITORS VISUALLY INSPECTED CAPACITORS BURNED IN FOR 100 HOURS CAPACITORS TESTED FOR NOISE

11. CDR 9 JULY 200111NCKU UCB Tohoku High Voltage Supplies P. Berg HV CAPACITOR BURN IN FIXTURE

12. CDR 9 JULY 200112NCKU UCB Tohoku High Voltage Supplies P. Berg HV CAP SCREENING SET UP

13. CDR 9 JULY 200113NCKU UCB Tohoku High Voltage Supplies P. Berg HV CAP HOLDING FIXTURE

14. CDR 9 JULY 200114NCKU UCB Tohoku High Voltage Supplies P. Berg SPECTROPHOTOMETER -2500 V SUPPLY

15. CDR 9 JULY 200115NCKU UCB Tohoku High Voltage Supplies P. Berg SPECTROPHOTOMETER -2500V SUPPLY

16. CDR 9 JULY 200116NCKU UCB Tohoku High Voltage Supplies P. Berg SPECTROPHOTOMETER HV ASSEMBLY

17. CDR 9 JULY 200117NCKU UCB Tohoku High Voltage Supplies P. Berg IMAGER HVPS ASSEMBLY

18. CDR 9 JULY 200118NCKU UCB Tohoku High Voltage Supplies P. Berg STATUS PARTS IN HOUSE TESTING BEGUN ON SPECTROPHOTOMETER SUPPLY STACK ASSEMBLY IN PROCESS WALL ASSEMBLY FOR SPECTROPHOTOMETER SUPPLY IN PROCESS